Lesson Notes By Weeks and Term - Junior Secondary School 2

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  4. Meaning and methods of asexual propagation

Week: 4

Class: Junior Secondary School 2

Term: 1st Term

Age: 13 years

Duration: 40 minutes of 2 periods

Date:

Subject: Agriculture

Topic:-       Meaning and methods of asexual propagation

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Define propagation
  2. List the types of propagation
  3. Explain asexual propagation
  4. Explain the methods of asexual propagation

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S ACTIVITY

STEP 1

INTRODUCTION

The teacher revises the previous lesson on uses and maintenance of farm structures and farm buildings

Students pay attention

STEP 2

EXPLANATION

She introduces the topic by explaining the meaning of propagation.

She further states the types of propagation

Students pay attention and participates

STEP 3

DEMONSTRATION

She then explains asexual propagation and further discusses the methods of asexual propagation

Students pay attention and participate

STEP 4

NOTE TAKING

The teacher writes a summarized note on the board

The students copy the note in their books

 

NOTE

PROPAGATION

Propagation is the production of new crops as independent units

There are two types of propagation

  1. sexual propagation
  2. asexual propagation

 

ASEXUAL PROPAGATION

Asexual propagation is the production of new individual plant using a part

of the parent or original plant. The part could be the root, stem or even the

leaf. Asexual propagation can also be called VEGETATIVE

PROPAGATION

 

METHODS OF ASEXUAL PROPAGATION

  1. Grafting: it is a technique that involves the placement of a section of a

stem with leaf buds into another plant in a way that both plants will unite

and continue to grow as one plant. This type of propagation combines the

good properties of two different plants into one plant e.g orange and other

plantation crops

  1. Cutting: this is a technique in which parts of plant are cut into portions

and planted to produce new plants. The cutting may be stem, leaves or

roots. Plant cutting can also be called STRIKING or CLONING. Examples

include stem cutting in cassava.

  1. Layering: this is a technique in which parts of the plant are made to

develop roots which they are still attached to the parent plant. It is done by

pegging down a shoot and cutting along a node at a point where produced.

It can be used for mangoes and breadfruits

 

Some categories of plants that are propagated asexually

  1. Corms: it is an underground stem which stores food e.g cocoyam
  2. Rhizomes: They are fleshy with long nodes and internodes. They grow

horizontally in the ground e.g ginger, spear grass et

  1. Bulbs: They have shoot stems from which fibrous adventitious grow e.g

Onion

  1. Stem tubers: they are underground stems which contain food reserves

as well as buds from which terminal shoots develop e.g yam, potatoes etc

  1. Suckers: these are plants that can be propagates through the sucker of a

crown division e.g banana, plantain and pineapple.

 

EVALUATION:    1. Explain the meaning of propagation

  1. List the types of propagation
  2. Define asexual propagation
  3. Explain the methods of asexual propagation
  4. State some categories of plants that are propagated asexually

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively